Efficient Z-scheme photocatalysts of ultrathin g-C3N4-wrapped Au/TiO2-nanocrystals for enhanced visible-light-driven conversion of CO2 with H2O

Inside‐and‐Out Semiconductor Engineering for CO2 Photoreduction: From Recent Advances to New Trends

“…[ 152,153 ] In Z‐scheme junction, the photogenerated charge carriers are efficiently separated through the interface between semiconductor and semiconductor or semiconductor–metal–semiconductor, and meanwhile the strong oxidative and reductive potentials were maintained. [ 154–157 ] 5) A series of new photocatalytic systems are developed for CO 2 photoreduction, such as metal organic frameworks (MOFs), [ 158–163 ] covalent organic frameworks (COFs), [ 164–169 ] semiconductor biohybrids systems, [ 170–172 ] and single atom. [ 173–177 ] These systems have different chemical affinities to CO 2 molecules, and thus may change the redox reaction pathways during CO 2 reduction process.…”

Recent Progress on Carbon Nitride and Its Hybrid Photocatalysts for CO2 Reduction

“…Similar to Ag, Au is also commonly used as an electron mediator to form electron mediator‐assisted Z‐scheme heterojunction. [ 139,140 ] Wang et al successfully designed and fabricated a novel core–shell Z‐scheme‐type photocatalyst, which combined g‐C 3 N 4 and anatase TiO 2 decorated with Au nanoparticles ((Au/A‐TiO 2 )@g‐C 3 N 4 ) via a facile chemical bonding reaction. [ 140 ] In the ternary (Au/A‐TiO 2 )@g‐C 3 N 4 , A‐TiO 2 is the core, g‐C 3 N 4 is the shell, and the Au nanoparticles act as the electron mediator of Z‐scheme junction.…”

“…[ 139,140 ] Wang et al successfully designed and fabricated a novel core–shell Z‐scheme‐type photocatalyst, which combined g‐C 3 N 4 and anatase TiO 2 decorated with Au nanoparticles ((Au/A‐TiO 2 )@g‐C 3 N 4 ) via a facile chemical bonding reaction. [ 140 ] In the ternary (Au/A‐TiO 2 )@g‐C 3 N 4 , A‐TiO 2 is the core, g‐C 3 N 4 is the shell, and the Au nanoparticles act as the electron mediator of Z‐scheme junction. Due to the electron mediator of Z‐scheme heterojunction, the separation of photogenerated charge carriers is promoted, the migration of electrons from TiO 2 to g‐C 3 N 4 is enhanced, and the surface densities of activated CO 2 and regional photoelectrons are also increased.…”

Engineering Heterostructured Nanocatalysts for CO2 Transformation Reactions: Advances and Perspectives

“…As a result, the selectivity to C 1 fuels (CO and CH 4 ) of Pt@CuO 2 cocatalyst reaches 85 %, whereas those of pure Pt and pure Cu cocatalysts are 41 % and 80 %, respectively. The TiO 2 coupling with other materials which act as either an electron acceptor or cocatalyst or molecular concentrator is another strategy for constructing core-shell structures, such as Au@TiO 2 core-shell composites, [87] Cu 3 (BTC) 2 @TiO 2 core-shell nanoparticles, [88] (Au/A-TiO 2 )@g-C 3 N 4 composite, [127] as listed in Table 4. Apart from TiO 2 -based core-shell materials, other photocatalysts with core-shell structures for CO 2 conversion have been also developed.…”